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test_yaml.py
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test_yaml.py
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"""
Tests for the resolver
"""
import os
import re
import pytest
import yaml
from tests.lib import DATA_DIR, create_basic_wheel_for_package, path_to_url
_conflict_finder_pat = re.compile(
# Conflicting Requirements: \
# A 1.0.0 requires B == 2.0.0, C 1.0.0 requires B == 1.0.0.
r"""
(?P<package>[\w\-_]+?)
[ ]
(?P<version>\S+?)
[ ]requires[ ]
(?P<selector>.+?)
(?=,|\.$)
""",
re.X
)
def generate_yaml_tests(directory):
"""
Generate yaml test cases from the yaml files in the given directory
"""
for yml_file in directory.glob("*/*.yml"):
data = yaml.safe_load(yml_file.read_text())
assert "cases" in data, "A fixture needs cases to be used in testing"
# Strip the parts of the directory to only get a name without
# extension and resolver directory
base_name = str(yml_file)[len(str(directory)) + 1:-4]
base = data.get("base", {})
cases = data["cases"]
for i, case_template in enumerate(cases):
case = base.copy()
case.update(case_template)
case[":name:"] = base_name
if len(cases) > 1:
case[":name:"] += "-" + str(i)
if case.pop("skip", False):
case = pytest.param(case, marks=pytest.mark.xfail)
yield case
def id_func(param):
"""
Give a nice parameter name to the generated function parameters
"""
if isinstance(param, dict) and ":name:" in param:
return param[":name:"]
retval = str(param)
if len(retval) > 25:
retval = retval[:20] + "..." + retval[-2:]
return retval
def convert_to_dict(string):
def stripping_split(my_str, splitwith, count=None):
if count is None:
return [x.strip() for x in my_str.strip().split(splitwith)]
else:
return [x.strip() for x in my_str.strip().split(splitwith, count)]
parts = stripping_split(string, ";")
retval = {}
retval["depends"] = []
retval["extras"] = {}
retval["name"], retval["version"] = stripping_split(parts[0], " ")
for part in parts[1:]:
verb, args_str = stripping_split(part, " ", 1)
assert verb in ["depends"], "Unknown verb {!r}".format(verb)
retval[verb] = stripping_split(args_str, ",")
return retval
def handle_install_request(script, requirement):
assert isinstance(requirement, str), (
"Need install requirement to be a string only"
)
result = script.pip(
"install",
"--no-index", "--find-links", path_to_url(script.scratch_path),
requirement, "--verbose",
allow_stderr_error=True,
allow_stderr_warning=True,
)
retval = {
"_result_object": result,
}
if result.returncode == 0:
# Check which packages got installed
retval["install"] = []
for path in result.files_created:
if path.endswith(".dist-info"):
name, version = (
os.path.basename(path)[:-len(".dist-info")]
).rsplit("-", 1)
# TODO: information about extras.
retval["install"].append(" ".join((name, version)))
retval["install"].sort()
# TODO: Support checking uninstallations
# retval["uninstall"] = []
elif "conflicting" in result.stderr.lower():
retval["conflicting"] = []
message = result.stderr.rsplit("\n", 1)[-1]
# XXX: There might be a better way than parsing the message
for match in re.finditer(message, _conflict_finder_pat):
di = match.groupdict()
retval["conflicting"].append(
{
"required_by": "{} {}".format(di["name"], di["version"]),
"selector": di["selector"]
}
)
return retval
@pytest.mark.yaml
@pytest.mark.parametrize(
"case", generate_yaml_tests(DATA_DIR.parent / "yaml"), ids=id_func
)
def test_yaml_based(script, case):
available = case.get("available", [])
requests = case.get("request", [])
transaction = case.get("transaction", [])
assert len(requests) == len(transaction), (
"Expected requests and transaction counts to be same"
)
# Create a custom index of all the packages that are supposed to be
# available
# XXX: This doesn't work because this isn't making an index of files.
for package in available:
if isinstance(package, str):
package = convert_to_dict(package)
assert isinstance(package, dict), "Needs to be a dictionary"
create_basic_wheel_for_package(script, **package)
available_actions = {
"install": handle_install_request
}
# use scratch path for index
for request, expected in zip(requests, transaction):
# The name of the key is what action has to be taken
assert len(request.keys()) == 1, "Expected only one action"
# Get the only key
action = list(request.keys())[0]
assert action in available_actions.keys(), (
"Unsupported action {!r}".format(action)
)
# Perform the requested action
effect = available_actions[action](script, request[action])
result = effect["_result_object"]
del effect["_result_object"]
assert effect == expected, str(result)